We asked an expert to settle this saucy age-old debate, once and for all.

Jacob Fox

Is there any condiment more iconically American than ketchup?

So is there a right answer to this age-old question?

bowl of ketchup with fries and chicken nuggets on tray

Credit:Jacob Fox

This is because pathogenic microorganisms (i.e.

However, once they’re there, they can significantly impact the taste and flavor.

Le references one microorganism in particular (Zygosaccharomyces rouxiito be exact) that is often used to makesoy sauce.

He notes that refrigeration is only necessary once the product has been opened.

But reallyit comes down to your personal preference.